Drawing-board stand.



A. JOHNSON.

DRAWING BOARD STAND.

APPLIGATION FILED 00T.1s, 1912.

1 ,088, l 53. Y Patented Feb. 24, 1914,

2 SHEETS-SHEET l.

COLUMBIA PLANOGRAPH C0.,wAsmNn1oN, D. e.

A. JOHNSON.

DRAWING BOARD STAND.

APPLICATION FILED 00T. 1s, 1912.

Patented M124, 1914.

2 SHEETS-SHEET 2.

Sme/who@ COLUMBIA PLANQGRAPH Co.,wvAsMlNc10N. D. C.

AUGUST JOHNSON, OF DETROIT, MICHIGAN.

DRAWING-BOARD STAND.

Speccaton of Letters Patent.

PatentedFeb. 24, 1914.

Application filed. October 16., 1912. Serial No. 726,178.

To all whom t may concern Be it known that 1, AUGUST JOHNSON, a citizen of the United States, residing at Detroit, in the county of Wayne, State of Michigan, have invented certain new and useful mprovements in Drawing-Board Stands; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to stands and more particularly to supporting stands for drawing boards.

An object of the invention is to provide an adjustable drawing board stand which will serve to properly support the drawing board at any desired angle.

Another object is to provide a stand of this type which will be of extremely simple construction, and which will servev to properly support the board with either end or side tilted as desired.

Another object is to generally improve and simplify the construction of devices of this character and increase the eciency thereof.

With these and other obiects in View, my invention will be more fully described, and illustrated in the accompanying drawings attached to and forming a part of this application in which,

Figure 1 is an elevational view of my complete device. Fig. 2 is a similar view at right angles to Fig. 2. Fig. 3 is a vertical sectional view on line 3-3 of Fig. 1. Fig. 4 is a` sectional view on line 4 4 of Fig. 2. Fig. 5 is an enlarged cross sectional view on line 5-5 of Fig. 1. Fig. 6 is a detail View of the central segment. Fig. 7 is a similar view of one of the segments to which the board is secured. Fig. 8 is a detail view of one of the pivot arms to which the end segments are pivoted.

Referring more particularly to the accompanying drawings in which similar reference characters designate corresponding parts throughout, 10 indicates the side members in the stationary portion of the frame and which are preferably of metal or other suitable material. Fach member 10 is provided at its lower corners with feet 11, between which is positioned the lower central boss 12. The upper edge of each member 10 terminates in an upper central boss 13,

directly above the boss 12. 1t will be understood that each member 10 comp-rises a frame 'consisting of the side or edge mem* bers 14 which converge toward their upper ends and arel joined at the boss 13, while their lower ends are connected to the arches l5 the inner ends of which are joined at the boss 12, while the outer ends terminate in the feet 11, previously described. Between the side or edge members 14 is the central member 16 which is bifurcated at its opposite ends to form the arms 17 and 18 at its upper and lower ends respectively. The arms 17 of the member 16 are directed outwardly and connected with the converging upper ends of the side or edge members 14,- vwhile the arms 18 are also directed out wardly and secured to the arches 15, be-

tween the points 'at which said arches are connected to the lower ends of the side or edge members 14 and the central boss 12.

l:Two side members 10 are provided and are "connected at their lower ends by means of the tubes 19 having the threaded members 2O secured 1n their outer ends by means of the rivets 21 or other suitable securing 'means and projecting through the bosses 12,* :suitable vnuts 22 being secured upon the outer ends of said threaded members.

The inner ends of the tubes 19 are connected by means of the lower clamping member 23, the opposite reduced extensions 24 of which are secured in the inner ends of the tubes 19,

as shown at25. The main port-ion of the clamping member 23 is in the form of a split ring, the opposite ends 26 are eX- tended in parallel relation with the clamp-h ing bolt 27 positioned therethrough for drawing the ends togetherA to clamp the lower end of the vertical pipe 28 within the ringrportion of the clamping member 23. The pipe 2.8 is secured through the clamping member 29 at its upper end, which member 29 is similar to the clamping member 23, having the clamping bolt 30 secured through the opposite ends 31 of the split ring portion of said member, while the opposite extensions 32 of said member 29 are secured in the inner ends of the tubes 33, as shown at 34. The threaded members 35 are secured in the outer ends of the tubes 33, as shown at 36 and extend through the bearings 13 in the side members 10, the nuts 37 being secured upon the free ends of the said members 35.

The upper extremity of the pipe 28, above the clamp member 29 is split, as shown at 38 and around this split portion of the pipe is positioned the split clamping ring 39, through the opposite outwardly directed ends 40 of which is engaged the clamping screw 41 carrying the head 42 by means of which said screw may be readily rotated to tighten the clamping ring 39 and thus secure the vertically Vadjusted pipe 43 in adjustable position within the pipe 28.

Secured in the upper ends of the pipe 43 is the reduced extension 44 of the forked head 45 having the bearing recesses 46 in the upperV ends of the parallel vforked portions 47 of the head 45, the purpose of which will presently appear. Resting within the bearing recesses 46 are theopposite ends of the shaft 48 of the segment 49 which extends between the parallel forked portions 47 of the heads 45, said segment being secured in position between said forked portions 47 by means of the set screw 50 extending through one end 47 and bearing against the segment 7 49, the reduced threaded portion 51 of said set screw projecting through the arcshaped slot 52 of the segment 49 in the threaded opening 53 of the opposite member 47 thus y securing the segment 49 against the bearing member 54 carried upon the inner face of the second member 47. When the head 55 of the nut 50 is turned in the proper direction yto'rotate the screw 50, the segment 49 will be looked in adjustable position between the members 47 thus preventing a" rotation of the shaft 48 and swinging movement of the segment between said members 47. rIfhe segment 49 is provided with the alined .collars 56 within which is rigidly secured the horizontal pipe 57 upon the opposite ends of which are secured the pivot arms v58. The vpivot pins 59 project outwardly through the central bearing openings 60 in the end segments 61 which areprovided with straight portions 62 secured to the under face of the drawing board 63, by means of the screws 64 or other suitable securing means. The set screws 65 extend through the arc shaped slots 66 in the curved portions of the segments 61 and into the threaded openings 67 in the lower end of the pivot arms 58. Y The bearing collars 68 are carried by the ,set screws 65 and, bearing against the segments 61 'to retain the same in adjustable position and thus lock the board 63 with either side tilted, or with the sides in the same horizontal plane as desired.

It will be seen that the pipe 43 may be adjusted to any height desired and readily secured in this position by tightening the set screw 41. It will also be apparent that either end of the board 63 may be tilted as desired by loosening the screw 50, thus allowing the shaft 48 to rotate in the bearing recesses 46 of the members 47, the segment 49 swinging between the said members 47. When the end of the board is tilted as desired, it is possible to turn the head 55 of the screw 50 to rotate the latter in the proper direction and thus bind the segment 49 between the members 47 To tilt either side of the board 63, the screws 65 are loosened and the end segments 61 swung properly upon the pivot pins 59. The screws 65 are then again tightened to lock the board in this position. It will be apparent that the height 'or angle of the board may be readily changed as desired, and when adjusted the board will be securely held in position.

From the foregoing it will be clearly seen that I have provided a drawing board stand of simple construction and which will be highly efficient and effective in use. It will also be understood that minor changes may be made in the details of construction within the scope of the claim without in the least departing from the spirit of my invention.

What is claimed is:

A drawing board stand comprising a frame, a forked head carried by said frame, a segment swingingly mounted in the head, collars carried by the segment, a horizontal tube secured in said collars, means for pivoting end segments to the opposite ends of the horizontal member, end segments secured to the tube by said means, means for securing the end segments against movement, and a drawing board carried by said end segments.

In testimony whereof, I affix my signature, in the presence of two witnesses.

AUGUST JOHNSON.

Y Witnesses:V

FRANK J. TRIPPENSEE, Y ALBERT W. TRIPPENSEE.

Copies ofths'patent'may be obtained for ve cents each, by addressing the Commissioner o1 Patents,

. Washington, D. C. 

